Can you specify more where the labels are you're looking to localize are? Are they physically in the webpart itself when you go to configure it or is it the results of what the webpart renders? If it's in the webpart configuration
Open the file and you can search by the text in the second column. Once you find them, add the same keys to the Localization app and define your text there. The system will take those "custom" defined values in the database over the values in the resource file and default to the resource file if there is no custom defined value. You can turn off this functionality by adding this to your web.config (then database will be last)
<add key="CMSUseSQLResourceManagerAsPrimary" value="false" />
Customer detail = order_new.customername (but this may not be what your looking for)
I don't see the other two in the file, so guessing they aren't localized.
Also, here is some additional information on localization within the UI that might help.